19892213450 has 24 divisors (see below), whose sum is σ = 37003286028. Its totient is φ = 7956074880.

The previous prime is 19892213353. The next prime is 19892213461. The reversal of 19892213450 is 5431229891.

It can be written as a sum of positive squares in 6 ways, for example, as 6434125369 + 13458088081 = 80213^2 + 116009^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 822734 + ... + 846566.

Almost surely, 2^19892213450 is an apocalyptic number.

19892213450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19892213450 is a deficient number, since it is larger than the sum of its proper divisors (17111072578).

19892213450 is a wasteful number, since it uses less digits than its factorization.

19892213450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40538 (or 40533 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 19892213450 in words is "nineteen billion, eight hundred ninety-two million, two hundred thirteen thousand, four hundred fifty".